How Wide Is a Mini Excavator?

Mini excavator width runs from about 2 feet 4 inches on the smallest micro models to roughly 8 feet 7 inches on large-compact units, so there is no single “standard” width that fits every jobsite. Many compact-radius (CR) models also use a retractable undercarriage. This lets the machine narrow to squeeze through a gate or doorway, then widen back out for stability once it’s digging.

How Wide a Mini Excavator Is by Size Class

This table shows overall width by size class, measured over the tracks in the standard configuration:

Every model in Thompson Tractor’s Cat® mini excavator lineup lists its width and undercarriage dimensions, so you can confirm fit before it reaches your site.

Why Width Varies Between Models

Undercarriage design accounts for most of the difference. Several Cat models, including the micro and CR classes, use a variable-gauge undercarriage that retracts several inches for tight passages and expands again for a wider, more stable stance while digging or lifting. Track and blade width usually match, though a dozer blade can extend slightly beyond the track footprint on either side, and width tends to increase with operating weight and dig depth.

Matching Width to Your Job

Think about what the machine needs to pass through before it starts working:

• Standard interior doorways, roughly 32-36 inches, generally only clear the narrowest micro models with the undercarriage retracted.
• Garden gates and fence openings, usually 36-48 inches, can fit micro and some compact models, especially with a retractable undercarriage.
• Tight side yards, easements, and urban lots often call for a compact or midsize CR model that can narrow for access and widen for work.

Pairing the right-sized machine with the right excavator bucket matters too. A bucket or blade that’s wider than the tracks can turn a machine that clears a gate into one that doesn’t.

Frequently Asked Questions

You might be interested in a few more answers about mini excavator width.

What Is the Narrowest Mini Excavator Available?

The Cat 300.9D is the narrowest model in the Cat lineup, with an overall width of 2 feet 5 inches and an undercarriage that retracts to 2 feet 4 inches — narrow enough to drive through a standard doorway for indoor work.

Can a Mini Excavator Fit Through a Standard Gate or Doorway?

A standard interior door is usually too narrow for anything but the smallest micro machines with the undercarriage retracted, while a typical garden gate can accommodate a few more compact models. Always measure the opening and compare it to the machine’s retracted width.

Does a Mini Excavator’s Width Change With Attachments?

Yes. A bucket, blade, or grapple can extend a few inches beyond the width of the tracks, so it’s worth checking attachment width in addition to undercarriage width when access is tight. This matters most at gates, sheds, and fence lines where clearance is already close.

Get the Right Fit With Thompson Tractor

Thompson Tractor can walk through your access points and match you with a Cat mini excavator built for the width you work in. Contact our team for a size consultation, or find your nearest location to see the lineup in person.